JP5308886B2 - Vertical waterproof structure - Google Patents

Description

  The present invention relates to a shaft waterproof structure. More specifically, for example, when constructing an underground storage facility such as a propane gas storage tank in the deep underground part, it is possible to prevent permeation of spring water from the surrounding natural ground into the vertical shaft leading to the underground storage facility It is related with the shaft waterproof structure applied to the above.

  In conventional shafts, especially deep underground shafts such as underground storage facilities, the spring water generated from the spray surface hinders facility construction. When there is always spring water, the welding machine cannot be used, so the work of laying the waterproof sheet while joining it by heat welding cannot be performed.

  Conventionally, for example, Patent Document 1 below is suitable for excavating a vertical shaft leading to an underground structure such as an oil reservoir or a radioactive waste reservoir in the deep underground. As a moving scaffolding device in a shaft excavator, a pillar with a fixed height is erected upward at the upper end of the main body of the excavator, and a scaffolding base is movably arranged on this pillar, and this scaffolding base is used. Thus, it has been proposed that a waterproof sheet is stretched on the inner surface of the shaft.

  However, when a waterproof sheet is stretched on the inner surface of the shaft as described above, it is difficult to stretch a long waterproof sheet corresponding to the length (depth) of the shaft at the same time. In that case, it is difficult to prepare a waterproof sheet having a length corresponding to the depth. Therefore, it is common to lay the sheets cut into a predetermined length one by one while appropriately wrapping them, but there is a lack of reliability because water permeates from the overlapped portion.

  In addition, when the above waterproof sheet is stretched while being sequentially added by adhesion, nail fastening, or other appropriate means, if it is added in the vertical direction or a long waterproof sheet is used, the load on the waterproof sheet is applied to the top of the waterproof sheet. Since it attaches to attached fixtures, such as an attached nail, and the waterproof sheet of the vicinity, there exists a possibility that a waterproof sheet may fall out with a fixture, or a sheet | seat may be damaged.

JP 2003-314186 A

  The present invention has been proposed in view of the above-mentioned problems, and the waterproof sheet is not accidentally dropped or damaged, and is attached and supported while easily and quickly connecting the waterproof sheet to the inner peripheral surface of the shaft. It is an object of the present invention to provide a shaft waterproof structure that can be made to operate.

In order to achieve the above object, the shaft waterproof structure according to the present invention has the following configuration. That is, a ring-shaped cross member having a predetermined width is installed at a predetermined arrangement pitch in the vertical direction on the inner peripheral surface of the shaft, and a waterproof sheet having a width substantially equal to the arrangement pitch is installed between the adjacent horizontal members in the vertical direction. Attached to and supported by the cross member in a state where the adjacent end portions of the waterproof sheets adjacent to each other are superposed on each other in a ring shape along the surface, the cross member is attached to the inner peripheral surface of the shaft It is characterized by being installed in a state separated from the inner peripheral surface of the shaft through an anchor inserted and installed and a mounting bracket fixed to the rear end side of the anchor .

  In addition, the end portions adjacent to each other on the top and bottom of the waterproof sheet are formed in an inner and outer double, and the outer end portions thereof are attached to and supported by the cross member in a state where the end portions are overlapped with each other. The parts may be joined to each other with a slide fastener. Further, both end portions in the circumferential direction of the waterproof sheet laid in a ring shape between the horizontal members adjacent to each other in the upper and lower directions are appropriately fixed, for example, sandwiched between a pair of inner and outer vertical members.

  Since the shaft waterproof structure according to the present invention has the above-described configuration, it is waterproof on the inner peripheral surface of the shaft without using a welding machine and without performing an operation of laying a waterproof sheet while overlapping the conventional waterproof sheet. The sheet can be attached and supported while being connected easily and quickly, and the load can be prevented from concentrating only on the uppermost part of the waterproof sheet. Accordingly, it is possible to satisfactorily prevent the waterproof sheet from being accidentally dropped or broken, and a shaft waterproof structure having high durability and reliability can be provided.

The longitudinal cross-sectional view which shows one Embodiment of the shaft waterproof structure by this invention. (A) is AA sectional drawing in FIG. 1, (b) is BB expanded sectional drawing in FIG. FIG. 3 is an enlarged view of a part of FIG. Explanatory drawing which shows the outline of arrangement | positioning structure of a horizontal member and a vertical member. (A) is an internal view of a part of a cross member and a vertical member before attaching a waterproof sheet as viewed from the direction C in FIG. 3, and (b) and (c) are bb and cc cross sections in (a). Figure. 5A is an enlarged cross-sectional plan view seen from the direction of arrow C in FIG. 5A, FIG. 5B is an inner surface view thereof, and FIG. 5C is a side view thereof. (A) is an EE expansion transverse plane view in Drawing 5 (a), (b) is the inside figure, and (c) is the side view. (A) is a longitudinal cross-sectional view of the cross member attachment part of the example which temporarily fixes the upper and lower both ends of a waterproof sheet with a hook-and-loop fastener, (b) is the same as the above figure of parts other than a cross member attachment part. (A) is a longitudinal cross-sectional view of the cross member attachment part of the example which formed the upper and lower both ends of the waterproof sheet in the inside and outside double, (b) is the same as the above figure of parts other than the cross member attachment part. An expanded inner view of a waterproof sheet. (A) is an inner surface figure of the both ends of the circumferential direction of a waterproof sheet, (b) is a bb expanded sectional view in (a). Explanatory drawing which shows an example of the process of laying the waterproof sheet in the shaft waterproof structure by this invention.

  The embodiment shown in the figure is applied to a vertical shaft that extends from the ground to a propane gas storage tank as an underground storage facility built in the deep underground, and spring water from surrounding natural ground is contained in the shaft. An example of the shaft waterproof structure for preventing permeation is shown. 1 and 2, reference numeral 1 denotes a vertical shaft, and the upper pit portion 1 a thereof is reinforced by a steel pipe sheet pile 11 or lining concrete 12 or the like previously placed around the pit, and is lower than the lining cocrete 12. The waterproof sheet 2 is laid on the inner surface of the sprayed concrete 13 sprayed on the inner peripheral surface of the shaft 1.

  When excavating the shaft 1, the steel pipe sheet pile 11 is previously placed in a ring shape around the well opening 1a by a prior drilling / replacement process or the like. 11 are mutually connected by sheet pile joints 11a, such as PP joint. In the figure, 14 is a root-grown grout material thrown into the lower side of the steel pipe sheet pile 11, 15 and 16 are fillers such as mortar and concrete filled in and around the steel pipe sheet pile 11, and 17 is the steel pipe sheet pile 11. A ring-shaped support (upset) made of H-shaped steel built in the vertical direction at a predetermined interval on the inner side, and the lining concrete 12 is continuously provided on the inner side of the support 17 and the upper part of the steel pipe sheet pile 11. Is formed.

  The waterproof sheet 2 is mounted and supported on the inner surface of the shotcrete 13 via a ring-shaped cross member 3 having a predetermined width, and the cross member 3 is arranged in a predetermined direction on the inner peripheral surface of the shaft 1 in the vertical direction. The waterproof sheet 2 is installed between the horizontal members 3 and 3 which are installed at a pitch (arrangement pitch) and are adjacent to the upper and lower sides thereof. Each of the waterproof sheets 2 has a vertical width dimension substantially equal to the above-described arrangement pitch, and is laid in a ring shape along the shaft inner peripheral surface between the horizontal members 3 and 3 adjacent to each other in the vertical direction. In addition, the waterproof sheets 2 and 2 adjacent to each other in the vertical direction are attached to and supported by the cross member 3 with a fixing tool such as a nail 31 in a state where the adjacent end portions (upper end portion and lower end portion) are overlapped. Although the size (interval size) of the horizontal member 3 in the vertical direction is appropriate, at least the weight of the waterproof sheet 2 laid between the horizontal members 3 adjacent to the upper and lower sides is passed through the horizontal member 3. The size should be such that it can be fully attached and supported.

  In the present embodiment, the ring-shaped cross member 3 is formed in an endless shape as shown in FIG. 4. However, the ring-shaped cross member 3 has an end shape in which both end portions abut each other or a slight gap between both end portions. It may be a partially circular shape, or may be a ring shape formed by adding a plurality of circular arc shapes. Further, in the present embodiment, the cross member 3 is attached to the inner surface of the shaft 1, more specifically to the inner surface of the shotcrete 13 via the mounting bracket 4 and the anchor 5 as shown in FIGS. 3 and 6. In the figure, the mounting bracket 4 is formed by cutting and raising a portion of the bracket main body 41 having a substantially C-shaped cross section that engages with the edge of the cross member 3 and a rear side of the bracket main body 41. It consists of a flat auxiliary metal fitting 44 connected to the bent portion 41 a by a bolt 42 and a nut 43. In the figure, 45 is a washer.

  In the present embodiment, the anchor 5 is of a known expansion type, and an expansion sleeve 51 is inserted into a hole formed in the inner surface of the shaft 1, and the wedge 52 is inserted at the tip of the expansion sleeve 51. The distal end portion is expanded and retained in the hole. The bolt 53 screwed into the expanding sleeve 51 is inserted into a hole (not shown) formed in the auxiliary metal fitting 44 and the auxiliary metal fitting 44 is sandwiched between a pair of nuts 54 and 54 screwed into the bolt 53 and tightened. The anchor 5 and the mounting bracket 4 are connected by fixing. In addition, each structure of the said attachment metal fitting 4 and the anchor 5, and both connection structure can be changed suitably.

  Further, both ends in the circumferential direction of each waterproof sheet 2 arranged in a ring shape between the upper and lower cross members 3 and 3 as described above are connected in a watertight manner so that at least water does not enter, and the configuration is appropriate. However, in the present embodiment, as shown in FIG. 7A, the both ends are sandwiched and fixed between a pair of inner and outer longitudinal members 6a and 6b. The means for fixing the longitudinal members 6a and 6b to the inner surface of the shaft and the means for integrating the longitudinal members 6a and 6b and both ends in the circumferential direction of the waterproof sheet 2 are appropriate. The material 6b is attached to the inner surface of the shaft 1 through the same mounting bracket 4 and anchor 5 as described above, and both end portions in the circumferential direction of the waterproof sheet 2 between the vertical material 6b and the vertical material 6a disposed inside the vertical material 6b. In addition, the adhesive 6 and the adhesive tape 61 as a fixing tool, particularly in the case of the figure, a band-like butyl tape is integrated between the vertical members 6a and 6b and the waterproof sheet 2.

  In addition, as said fixing tool, a nail, a screw, etc. may be used instead of said adhesive material or adhesive tape 61, and the said vertical members 6a and 6b are clamped with a volt | bolt nut etc. in combination with them. You may do it. Moreover, although the said embodiment used the nail 31 as a fixing tool which attaches and supports the edge part which adjoins the waterproof sheet 2 * 2 adjacent to the said upper and lower sides to the said horizontal member 3, using screws, an adhesive material, etc. Alternatively, these plural types of fixtures may be used in appropriate combination. Further, when attaching the waterproof sheets 2 and 2 adjacent to each other in the vertical direction, for example, as shown in FIG. 8, the end portions of the waterproof sheets 2 and 2 adjacent to each other in the vertical direction are used with a hook-and-loop fastener such as Velcro (registered trademark). In particular, as shown in the illustrated example, male and female engaging pieces 32a and 32b constituting the surface fastener 32 are previously attached to the ends of the upper and lower waterproof sheets 2 and 2, respectively, and both the engaging pieces 32a and 32b are attached. May be fixed with a fixing tool such as a nail 31 after being temporarily engaged.

  Further, for example, as shown in FIG. 9, the upper and lower ends of the waterproof sheet 2 are formed in an inner and outer double, and the outer pieces 22 and 22 of the inner and outer double ends are overlapped with each other in the same manner as described above. In addition, the inner pieces 21 and 21 may be joined to each other by a waterproof slide fastener 33 provided at the edge thereof while being attached to and supported by the cross member 3 with a fixing tool such as a nail 31. The material and configuration of the slide fastener 33 are appropriate.

  Further, the upper part of the uppermost waterproof sheet 2 may be attached and supported on the inner surface of the shaft 1 through the cross member 3 in the same manner as described above. For example, as shown in FIG. An eyelet hole 20 made of an eyelet or the like may be formed, and the waterproof sheet 2 may be attached to the inner surface of the shaft 1 using the eyelet hole 20. The mounting method in that case is appropriate and omitted in the drawing, but, for example, a headed bolt or the like is inserted into the eyelet hole 20, and the tip of the bolt is driven or embedded in the lower part of the lining concrete 12 or the like. If it is screwed into an anchor or an insert nut, it can be easily mounted and supported.

  In the above embodiment, both ends in the circumferential direction of the waterproof sheet 2 arranged in a ring shape are sandwiched between a pair of inner and outer longitudinal members 6a and 6b and fixed with a fixture such as an adhesive tape 61. It can be changed as appropriate. FIG. 11 shows an example of this. Between an outer vertical member 6b attached to the inner surface of the shaft 1 through the same mounting bracket 4 and anchor 5 as above, and a vertical member 6a arranged on the inner side. While sandwiching both ends in the circumferential direction of the waterproof sheet 2, an adhesive tape 61 such as a strip-like butyl tape similar to the above is interposed between the vertical members 6 a and 6 b and the waterproof sheet 2, and the outer vertical member 6 b The planted bolt 62 is inserted into a hole formed in the inner vertical member 6 a and is fastened and fixed by a nut 63 screwed into the tip of the bolt 62. In the figure, 64 is a washer.

  The material, size, shape, and the like of the member constituting the shaft waterproof structure according to the present invention configured as described above are appropriate, but the material of the main member used in the embodiment of the present invention is only for reference. An example of the size and shape is summarized in Table 1 below.

Next, although the process at the time of constructing the shaft waterproof structure constructed as described above is appropriate, an example of the process is shown in FIG. 9 where the adjacent end portions of the upper and lower waterproof sheets 2 are arranged. In addition, an example in which both ends in the circumferential direction of each waterproof sheet 2 are configured as shown in FIG. 11 will be described according to the flowchart shown in FIG.
1) Step S1 (Installation of cross member and outer vertical member)
First, the cross member 3 and the outer vertical member 6b are attached. Thereby, a flat surface can be provided at the design position on the shotcrete 13 so that the waterproof sheet 2 can be stretched smoothly.
2) Step S2 (Attaching the upper prevention sheet)
The upper waterproof sheet 2 is attached to the cross member 3 at a predetermined position where ink is drawn. In the above embodiment, the uppermost waterproof sheet 2 may be attached to the lining concrete 12 by inserting a bolt or the like (not shown) into the eyelet hole 20 made of a plastic eyelet.
3) Step S3 (Attaching the lower waterproof sheet)
Temporarily fix with the hook-and-loop fastener 32 at the lower end of the upper sheet that has been applied (the position marked in advance at the factory or the like).
4) Step S4 (fixing of upper and lower prevention sheets)
The outer pieces 22 and 22 of the adjacent inner and outer double ends of the upper and lower waterproof sheets 2 are fixed to the cross member 3 with a fixing tool such as a nail 31 or the like.
5) Step S5 (joining of upper and lower waterproof sheets)
The slide fastener 33 provided at the edge of the inner pieces 21 and 21 of the inner and outer double ends is closed and joined.
6) Step S6 (fixing both ends in the circumferential direction of the waterproof sheet)
The both ends in the circumferential direction of the waterproof sheet 3 laid in a ring shape on the inner surface of the shaft are water-tightly closed by appropriate means. For example, as shown in FIG. -Fix the adhesive tape 61 between the inner and outer vertical members 6a, 6b at both ends in the circumferential direction as shown in FIG. What is necessary is just to clamp | tighten and fix with the volt | bolt 62 and the nut 63 through a tool.

  After that, if the lower waterproof sheet 2 is used as the upper waterproof sheet 2 and the lower waterproof sheet 2 is further constructed in the same manner as described above, the inner periphery of the deep waterproof shaft 1 can be obtained. The waterproof sheet 2 can be laid on the surface easily and quickly.

  As described above, the shaft waterproof structure according to the present invention is configured by installing the ring-shaped cross members 3 on the inner peripheral surface of the shaft 1 at a predetermined arrangement pitch in the vertical direction, and the waterproof sheet 2 having a width substantially equal to the arrangement pitch. Laying in the shape of a ring along the inner peripheral surface of the shaft 1 between the horizontal members 3 and 3 adjacent to each other vertically, and overlapping the adjacent end portions 2a and 2b of the waterproof sheets 2 and 2 adjacent to each other vertically In this state, the waterproof sheet 2 is attached and supported on the cross member 3, so that the waterproof sheet 2 can be easily and quickly attached and supported on the inner peripheral surface of the shaft 1 without performing the conventional waterproof sheet welding operation. Further, it is possible to prevent the load from being concentrated only on the uppermost waterproof sheet. As a result, it is possible to satisfactorily prevent the waterproof sheet 2 from being accidentally dropped or damaged, and a shaft waterproof structure having high durability and reliability can be provided.

  In addition, the two adjacent end portions 2a and 2b of the upper and lower waterproof sheets 2 and 2 are formed in an inner and outer double, and the outer end portions thereof are attached to the cross member 3 in a state of being overlapped with each other. When the inner ends are joined to each other by the slide fastener 7, the waterproof performance can be further improved by the inner and outer double waterproof function, and the water pressure by the spring water is mainly the outer end. As a result, almost no water pressure is applied to the slide fastener 7, so that the durability and reliability can be greatly improved.

  Moreover, if the both ends in the circumferential direction of the waterproof sheet laid in a ring shape on the inner surface of the shaft are sandwiched and fixed between the pair of inner and outer vertical members 6a and 6b as described above, it can be fixed easily and reliably. it can.

  As described above, according to the shaft waterproof structure according to the present invention, the waterproof sheet 2 can be mounted and supported while easily and quickly connected to the inner surface of the shaft without using a welding machine, and the load is applied only to the uppermost portion of the waterproof sheet. Can be prevented from concentrating. As a result, it is possible to satisfactorily prevent the waterproof sheet 2 from being inadvertently dropped or damaged, and to provide a highly durable and reliable shaft waterproof structure. The present invention can be applied not only to the shafts extending from the ground to the propane gas storage tank in the deep underground portion, but also to various shafts, and can be used effectively industrially.

DESCRIPTION OF SYMBOLS 1 Vertical shaft 1a Wellhead part 11 Steel pipe sheet pile 11a Sheet pile joint 12 Covering cocrete 13 Shotcrete 14 Rooting grout material 15, 16 Filler 17 Support 2 Waterproof sheet 21 Inner piece 22 Outer piece 3 Cross member 31 Nail 32 Surface fastener 33 Slide fastener 4 Mounting bracket 41 Bracket main body 41a Bending portion 42 Bolt 43 Nut 44 Auxiliary bracket 5 Anchor 51 Expanding sleeve 52 Wedge 53 Bolt 54 Nut 6a, 6b Vertical member 61 Adhesive tape 62 Bolt 63 Nut

Claims (3)

A ring-shaped cross member with a predetermined width is installed at a predetermined arrangement pitch in the vertical direction on the inner peripheral surface of the shaft, and a waterproof sheet having a width substantially equal to the arrangement pitch is installed on the inner peripheral surface of the vertical shaft between adjacent horizontal members. Attached to and supported by the cross member in a state where each adjacent end portion of the waterproof sheet adjacent to the top and bottom of each is laid in a ring shape along the upper and lower sides ,
The cross member is installed in a state of being separated from the inner peripheral surface of the shaft through an anchor inserted and installed in the inner peripheral surface of the shaft and a mounting bracket fixed to the rear end side of the anchor. Vertical shaft waterproof structure characterized by that.   The end portions adjacent to each other of the above and below adjacent waterproof sheets are formed in an inner and outer double, and the outer end portions are attached to and supported by the cross member in a state of being overlapped with each other, and the inner end portions are The shaft waterproof structure according to claim 1, wherein the shafts are joined to each other by a slide fastener.   The shaft waterproof structure according to claim 1 or 2, wherein both ends in the circumferential direction of a waterproof sheet laid in a ring shape between the horizontal members adjacent to each other above and below are sandwiched and fixed between a pair of inner and outer vertical members.

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